<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            background-color: pink;
            height: 200px;
            width: 200px;
        }
    </style>
</head>
<body>
    <div></div>

    <script>
        var div = document.querySelector('div')
        div.onclick = function(e){
            console.log(e);
            // ie678需要采用以下写法
            console.log(window.event);
        }
    </script>
</body>
</html>